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Cough Reflex Sensitivity and Bronchial Hyper-responsiveness

16. Februar 2017 aktualisiert von: Kenneth R. DeVault, M.D., Mayo Clinic

Pilot Studies Evaluating Cough Reflex Sensitivity and Bronchial Hyper-responsiveness: The Road to Cough and Wheeze in Patients With Gastroesophageal Reflux.

The aim of this study is to provide pilot data on the possible gastrointestinal predictors of respiratory hyper-responsiveness and how these relate to the clinical sub-types of gastroesophageal reflux disease (GERD) and visceral acid hypersensitivity.

Studienübersicht

Detaillierte Beschreibung

This study recruited participants into three groups: reflux patients with non-erosive disease (NERD) with abnormal levels of acid reflux, NERD patients with normal levels of reflux and healthy volunteers. Participants were assessed for cough reflex sensitivity (CRS) to citric acid and bronchial-hyperresponsiveness (BHR) to methacholine challenge, both before (baseline) and after esophageal acid infusion (HCl, 0.15M) or normal saline control (8ml/min). The order of CRS and BHR was randomized, as was the order of the acid/saline infusions.

Studientyp

Beobachtungs

Einschreibung (Tatsächlich)

24

Kontakte und Standorte

Dieser Abschnitt enthält die Kontaktdaten derjenigen, die die Studie durchführen, und Informationen darüber, wo diese Studie durchgeführt wird.

Studienorte

    • Florida
      • Jacksonville, Florida, Vereinigte Staaten, 32224
        • Mayo Clinic Florida

Teilnahmekriterien

Forscher suchen nach Personen, die einer bestimmten Beschreibung entsprechen, die als Auswahlkriterien bezeichnet werden. Einige Beispiele für diese Kriterien sind der allgemeine Gesundheitszustand einer Person oder frühere Behandlungen.

Zulassungskriterien

Studienberechtigtes Alter

18 Jahre bis 60 Jahre (Erwachsene)

Akzeptiert gesunde Freiwillige

Ja

Studienberechtigte Geschlechter

Alle

Probenahmeverfahren

Wahrscheinlichkeitsstichprobe

Studienpopulation

This study will recruit participants into three groups ages 18-60 years: 12 reflux patients with non-erosive disease (NERD) with abnormal levels of acid reflux, 12 NERD patients with normal levels of reflux and 12 healthy volunteers.

Beschreibung

Inclusion Criteria:

  • symptomatic reflux (i.e., one symptom at least one day a week, with at least 'moderate' severity)
  • no evidence of esophagitis
  • non-smokers

Exclusion Criteria:

  • previous gastrointestinal surgery (excluding minor surgeries, such as cholecystectomy, appendectomy
  • active peptic ulcer disease
  • Zollinger Ellison Syndrome
  • Barrett's esophagus
  • eosinophilic esophagitis
  • cardiac disease
  • diabetes or neurological deficit
  • use of tricyclics
  • selective serotonin reuptake inhibitors
  • narcotics or benzodiazepines
  • current use of medications that may affect symptoms of perception,lower esophageal sphincter basal pressure, acid clearance time or acid suppression
  • antibiotics within 60 days
  • Nursing mothers will be excluded
  • allergies to citrus
  • asthma
  • chronic lung disease
  • heart attack or stroke within the last three months
  • hypersensitivity to methacholine products
  • know aortic aneurysm
  • uncontrolled hypertension (defined as systolic pressure greater than 200 or diastolic greater than 100)
  • reduced pulmonary function test (forced expiratory volume in one second (FEV1) or the FEV1 to forced vital capacity (FVC) ratio (FEV1/FVC) of less that 70% of predicted value)
  • None of the controls will have any GERD symptoms or ever used antireflux treatment.

Studienplan

Dieser Abschnitt enthält Einzelheiten zum Studienplan, einschließlich des Studiendesigns und der Messung der Studieninhalte.

Wie ist die Studie aufgebaut?

Designdetails

Kohorten und Interventionen

Gruppe / Kohorte
Intervention / Behandlung
Healthy Volunteers
Subjects in this arm were healthy volunteers. Subjects underwent both Cough Reflex Sensitivity and the Methacholine Challenge procedures.
Subjects inhaled increasing concentrations of citric acid, which induces coughing in a dose-dependent, reproducible matter. Following each inhalation, the number of coughs in the subsequent 15 seconds was counted and recorded. The challenge was terminated once the citric acid induced 5 or more coughs and the logarithmic (base 10) concentration provoking 5 coughs was recorded.
A baseline spirometry was used to assess how well the participant's lungs work by measuring how much air was inhale, how much was exhale and how quickly the participant exhaled. If this was normal, the subject inhaled slowly and deeply the methacholine test solution from a nebulizer and was told to hold their breath for 5 seconds. This was repeated until 5 inhalations were performed in no more than two minutes.
Non-erosive reflux disease with reflux
Subjects enrolled in this arm had non-erosive reflux disease with reflux (heartburn) for at least 6 of the preceding 12 months. Subjects underwent both Cough Reflex Sensitivity and the Methacholine Challenge procedures.
Subjects inhaled increasing concentrations of citric acid, which induces coughing in a dose-dependent, reproducible matter. Following each inhalation, the number of coughs in the subsequent 15 seconds was counted and recorded. The challenge was terminated once the citric acid induced 5 or more coughs and the logarithmic (base 10) concentration provoking 5 coughs was recorded.
A baseline spirometry was used to assess how well the participant's lungs work by measuring how much air was inhale, how much was exhale and how quickly the participant exhaled. If this was normal, the subject inhaled slowly and deeply the methacholine test solution from a nebulizer and was told to hold their breath for 5 seconds. This was repeated until 5 inhalations were performed in no more than two minutes.
Non-erosive reflux disease without reflux
Subjects enrolled in this arm had non-erosive reflux disease with normal levels of reflux (heartburn). Subjects underwent both Cough Reflex Sensitivity and the Methacholine Challenge procedures.
Subjects inhaled increasing concentrations of citric acid, which induces coughing in a dose-dependent, reproducible matter. Following each inhalation, the number of coughs in the subsequent 15 seconds was counted and recorded. The challenge was terminated once the citric acid induced 5 or more coughs and the logarithmic (base 10) concentration provoking 5 coughs was recorded.
A baseline spirometry was used to assess how well the participant's lungs work by measuring how much air was inhale, how much was exhale and how quickly the participant exhaled. If this was normal, the subject inhaled slowly and deeply the methacholine test solution from a nebulizer and was told to hold their breath for 5 seconds. This was repeated until 5 inhalations were performed in no more than two minutes.

Was misst die Studie?

Primäre Ergebnismessungen

Ergebnis Maßnahme
Zeitfenster
Change in cough reflex sensitivity (CRS)
Zeitfenster: baseline, approximately 4 weeks
baseline, approximately 4 weeks

Mitarbeiter und Ermittler

Hier finden Sie Personen und Organisationen, die an dieser Studie beteiligt sind.

Sponsor

Ermittler

  • Hauptermittler: Kenneth R. DeVault, MD, Mayo Clinic

Studienaufzeichnungsdaten

Diese Daten verfolgen den Fortschritt der Übermittlung von Studienaufzeichnungen und zusammenfassenden Ergebnissen an ClinicalTrials.gov. Studienaufzeichnungen und gemeldete Ergebnisse werden von der National Library of Medicine (NLM) überprüft, um sicherzustellen, dass sie bestimmten Qualitätskontrollstandards entsprechen, bevor sie auf der öffentlichen Website veröffentlicht werden.

Haupttermine studieren

Studienbeginn (Tatsächlich)

1. Dezember 2012

Primärer Abschluss (Tatsächlich)

1. Februar 2016

Studienabschluss (Tatsächlich)

1. Februar 2016

Studienanmeldedaten

Zuerst eingereicht

24. Januar 2013

Zuerst eingereicht, das die QC-Kriterien erfüllt hat

24. Januar 2013

Zuerst gepostet (Schätzen)

29. Januar 2013

Studienaufzeichnungsaktualisierungen

Letztes Update gepostet (Tatsächlich)

17. Februar 2017

Letztes eingereichtes Update, das die QC-Kriterien erfüllt

16. Februar 2017

Zuletzt verifiziert

1. Februar 2017

Mehr Informationen

Begriffe im Zusammenhang mit dieser Studie

Plan für individuelle Teilnehmerdaten (IPD)

Planen Sie, individuelle Teilnehmerdaten (IPD) zu teilen?

NEIN

Arzneimittel- und Geräteinformationen, Studienunterlagen

Studiert ein von der US-amerikanischen FDA reguliertes Arzneimittelprodukt

Nein

Studiert ein von der US-amerikanischen FDA reguliertes Geräteprodukt

Nein

Diese Informationen wurden ohne Änderungen direkt von der Website clinicaltrials.gov abgerufen. Wenn Sie Ihre Studiendaten ändern, entfernen oder aktualisieren möchten, wenden Sie sich bitte an register@clinicaltrials.gov. Sobald eine Änderung auf clinicaltrials.gov implementiert wird, wird diese automatisch auch auf unserer Website aktualisiert .

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